EFFECT OFNiON THE ELECTRICAL AND MICROSTRUCTURAL PROPERTIES OF NANOCRYSTALLITESFe2O3/TiO2SYSTEM

Maged S. Sobhy ()
Additional contact information
Maged S. Sobhy: Materials Science Laboratory, Physics Department, Faculty of Science, Beni-Suef University, Beni-Suef, Egypt

Surface Review and Letters (SRL), 2006, vol. 13, issue 04, 479-484

Abstract: Nominal compositions ofNixTi1-xFe2O5-δ(x = 0, 0.2, 0.4, 0.6, 0.8 and 1) were prepared by a solid state reaction using stoichiometric amounts ofFe2O3/TiO2system andNiOas a dopant. The effects of small substitution ofNiions on the electrical and structural properties were studied for the above system. The X-ray diffraction patterns revealed that the ferroelectric phase of iron titanate and the spinel ferrite phase ofNi-ferrite having a single phase atx = 0and 1, respectively. The substitution ofNiions increases the average value of lattice constant aav. Solid–solid interaction took place between the ternary oxides at 1200°C for 4 h yielding a new phase ofNiTiO3. The presence of the three phases was confirmed by X-ray diffraction technique. The resultant compositions have nanocrystallites with average crystalline size "Dav" in the range 100–300 nm. The DC electrical resistivity ρ, Curie temperatureTCand activation energies for electric conduction aroundTCregion increase asNiion substitution increases. The ferrite samples have a semiconductor behavior where electrical resistivity ρ decreases on increasing temperature. The activation energy for electrical conduction was affected by both the ratio "ferroelectric/ferrite" and the position of the Curie temperatures in the compositions depending on the (Ni,Ti) toFeratio.

Keywords: Magnetic semiconductor ferrites; ferroelectric/ferrite nanocrystallites system; X-ray diffraction; resistivity; Curie temperature (search for similar items in EconPapers)
Date: 2006
References: View complete reference list from CitEc
Citations:

Downloads: (external link)
http://www.worldscientific.com/doi/abs/10.1142/S0218625X06008712
Access to full text is restricted to subscribers

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:wsi:srlxxx:v:13:y:2006:i:04:n:s0218625x06008712

Ordering information: This journal article can be ordered from

DOI: 10.1142/S0218625X06008712

Access Statistics for this article

Surface Review and Letters (SRL) is currently edited by S Y Tong

More articles in Surface Review and Letters (SRL) from World Scientific Publishing Co. Pte. Ltd.
Bibliographic data for series maintained by Tai Tone Lim ().